Mineral (Metal)

Snowflake Obsidian

Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)

Gold flakes

Native Gold (Au)

Quartz Geode (Druzy)

Crystalline Silicon Dioxide (SiO2)

Amethyst

Silicon dioxide with iron impurities (SiO2)

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Ruby in Zoisite (Anyolite)

Anyolite (Combination of Corundum and Zoisite)

Fuchsite

Chrome-bearing Muscovite [K(Al,Cr)2(AlSi3O10)(OH)2]

Moonstone

Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Herkimer Diamond

Quartz (Silicon Dioxide) - SiO2

Amethyst (Tumbled)

Quartz (Silicon Dioxide, SiO2) with iron impurities

Herkimer Diamond

Quartz (Silicon Dioxide) - SiO2

Rose Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (High-purity SiO2)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Red Sandstone

Arenite (Ferruginous Sandstone)

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Granite

Granite (Phaneritic Igneous Rock / Quartz, Feldspar, Mica)

Granite Cobble

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase Feldspar)

Granite (Pink/Red Orthoclase variety)

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Moonstone

Orthoclase Feldspar (formula: (K,Na)AlSi3O8)

Greenschist

Greenschist (chlorite-epidote schist)

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Green Aventurine

Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)

Mica Schist

Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Labradorite

Labradorite (a calcium-enriched sodic plagioclase feldspar mineral - (Ca, Na)(Al, Si)4O8)

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with included minerals (Fuchsite for green)

Rough Diamond

Diamond (Native Carbon, C)

Diamond (in a jewelry setting)

Diamond (Carbon, C)

White Agate / Chalcedony

Silicon Dioxide (SiO2)

Eudialyte in Matrix

Na15Ca6(Fe,Mn)3Zr3(Si,Nb) (Si25O73) (OH,Cl,H2O)3

Diamond

Diamond (Pure Carbon, C)

Milky Quartz

Silicon Dioxide (SiO2)

Pink Tourmaline (Rubellite)

Rb:Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite variety)